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- HD_209458 abstract "HD 209458 is an 8th magnitude star in the constellation Pegasus. It is very similar to our Sun, and it is classified as a yellow dwarf (spectral class G0 V). Because it is located at a distance of about 150 light years, it is not visible to the unaided eye. With good binoculars or small telescope it should be easily detectable.In 1999 two teams working independently (one team consisted of astronomers at the Geneva Observatory, the Harvard-Smithsonian Center for Astrophysics, and the Wise Observatory; the second group was the California and Carnegie Planet Search team) discovered an extrasolar planet orbiting the star by using the radial velocity planet search method. Soon after the discovery, separate teams led by David Charbonneau and Gregory W. Henry were able to detect a transit of the planet across the surface of the star making it the first known transiting extrasolar planet. The planet received the designation HD 209458 b.Because the planet transits the star, the star is dimmed by about 2% every 3.5 days making it an extrinsic variable. The variable star designation for HD 209458 is V376 Pegasi. It is the prototype of the variable class "EP" in the General Catalogue of Variable Stars, defined as stars showing eclipses by their planets.".
- HD_209458 thumbnail Pegasus_constellation_map.svg?width=300.
- HD_209458 wikiPageExternalLink etoile.php?nom=HD+209458.
- HD_209458 wikiPageID "903655".
- HD_209458 wikiPageRevisionID "562575772".
- HD_209458 absmagV "4.28".
- HD_209458 age "× 109".
- HD_209458 appmag "6.3".
- HD_209458 appmag "8.24".
- HD_209458 appmag1Passband "B".
- HD_209458 appmag2Passband "K".
- HD_209458 appmagV "7.65".
- HD_209458 bV "+0.574 ±0.014".
- HD_209458 class "G0V".
- HD_209458 constell Pegasus_(constellation).
- HD_209458 dec "+18° 53′ 04″".
- HD_209458 distLy "154".
- HD_209458 distPc "47.1".
- HD_209458 eccentricity "0".
- HD_209458 epe "HD+209458".
- HD_209458 epoch "J2000".
- HD_209458 exoplanet HD_209458_b.
- HD_209458 hasPhotoCollection HD_209458.
- HD_209458 luminosity "1.61".
- HD_209458 mass "0.69".
- HD_209458 mass "1.13".
- HD_209458 metal "0".
- HD_209458 nsted "HD+209458".
- HD_209458 pError "1".
- HD_209458 parallax "21.24".
- HD_209458 period "3.52474541".
- HD_209458 propMoDec "-18.37".
- HD_209458 propMoRa "28.9".
- HD_209458 ra "79390.8".
- HD_209458 radialV "-14.8".
- HD_209458 radius "1.14".
- HD_209458 rotation "1244160.0".
- HD_209458 semimajor "0.045".
- HD_209458 simbad "HD+209458".
- HD_209458 temperature "6000".
- HD_209458 variable "EP".
- HD_209458 subject Category:G-type_main-sequence_stars.
- HD_209458 subject Category:Henry_Draper_Catalogue_objects.
- HD_209458 subject Category:Hipparcos_objects.
- HD_209458 subject Category:Objects_named_with_variable_star_designations.
- HD_209458 subject Category:Pegasus_(constellation).
- HD_209458 subject Category:Planetary_systems.
- HD_209458 subject Category:Planetary_transit_variables.
- HD_209458 type CelestialBody.
- HD_209458 type Star.
- HD_209458 type PhysicalBody.
- HD_209458 comment "HD 209458 is an 8th magnitude star in the constellation Pegasus. It is very similar to our Sun, and it is classified as a yellow dwarf (spectral class G0 V). Because it is located at a distance of about 150 light years, it is not visible to the unaided eye.".
- HD_209458 label "HD 209458".
- HD_209458 label "HD 209458".
- HD_209458 label "HD 209458".
- HD_209458 label "HD 209458".
- HD_209458 label "HD 209458".
- HD_209458 label "HD 209458".
- HD_209458 label "HD 209458".
- HD_209458 label "HD 209458".
- HD_209458 label "HD 209458".
- HD_209458 sameAs HD_209458.
- HD_209458 sameAs HD_209458.
- HD_209458 sameAs HD_209458.
- HD_209458 sameAs HD_209458.
- HD_209458 sameAs HD_209458.
- HD_209458 sameAs HD_209458.
- HD_209458 sameAs HD_209458.
- HD_209458 sameAs m.03ngbw.
- HD_209458 sameAs Q186053.
- HD_209458 sameAs Q186053.
- HD_209458 wasDerivedFrom HD_209458?oldid=562575772.
- HD_209458 depiction Pegasus_constellation_map.svg.
- HD_209458 isPrimaryTopicOf HD_209458.
- HD_209458 name "HD 209458".
